Spacing jack



Mmh 16,1926. 1,577,249

F. B. COMSTOCK `SPACING JACK Filed Dec. 5, -1923 WITNESSGS ATTORNEY Fat-exited Mar. 16, 192.

iPATisNrwOFFICE.i

FRANK B. coMsTocK, or KNAPP CREEK, NEW YORK.

,SIMKJING- JACK.

l AApplication filed lDecember To all whom t may concern.:

Be it known that I, FRANK B. CoMsTock,

a citizen of thev United States, residing atl `Knapp Creek, in the county Vof Cattaraugns and State of New York, have invented. new and usefuly Improvements in Spacing Jacks1 of which the following is a specification'.

In pumping oil from wells, it frequently happens that a volume of gas iinds its way into the space between the piston and thel standing valve, but that the pressure of this gas is not enough to pass through the valve Vin the piston, and consequently remains in thef lower part of the cylinder, thereby destroying the vacuuml which is necessary 'to open the standing valve and allow oil to enter the cylinder. To remedy this condition, the operator must increase the length Y of the Vcable yconnecting the pump rod with the motive power used to actuate the pump, in order to allow the piston to move downwardly in the pump cylinder, thereby coinpressing the gas juntil it opens the valve in thepiston yand escapes to the other side thereof. It is then necessary to return to the motive 'power which is'V frequently a considerable distance away fromthe pump to take the slack out of thecable after thepisL .Y .tonv and pump 'rod have beenvproperly adjusted iwith relationto the standing valve. Ihis requires considerable time and labor, and must be frequently done when it is necessary to raise or lower the piston with a View ofproperlyspacing the same with relation to the standing valve, and for other reasons too numerous to enumerate., Y

It is therefore the purpose of'this invention to provide what I term a spacing jack by means of which the pump rod can be raised or loweredin a comparatively quick and easy manner, and with a minimum of effort, the jack being very simple in construction, so that it can be manufactured and sold at a nominal cost.

More specifically stated, the invention contemplates the provision of a jackof the character vmentioned, the jack being designed to be slipped over one end of the pump rod, and subsequently turned to either 3, 1923. Serial No. 678,293.

elevate orlower the rod as the occasion mavrequire, thus making it possible to properly space the piston with relation to the standing valve in a convenient manner. i

Other objects and advantages ofithe in-v vention will be apparent, when the following detailed description is read in connect-ion with the accompanying drawing, the invention residing in kthe construction, combination and arrangement of parts as claimed.

In the drawing forming part of this application, like numerals of reference indicate similar parts'in the several views, and wherein:

Figure l is a View showingr the manner of using the spacing jack.

Figure 2 is a view of the jack removed from the pump rod.

Figure 3 is an end elevation.

Figure 4; is a longitudinal sectional view through the jack.v f Referring to the drawing in detail, 10 indicates a portion ofthe Vpump casing which projects above the ground or surface, while 11 represents the pump rod. This rod is provided with a" clamp 12 which normally reposes upon the horizontal arm 13 forming part of a pump jack of well known construction. furcated to straddle or receive the pump rod 11, while the other end of this rod'is pivoted as shown upony the standard 14 The arm 13 has one end bi-` which rises from the base 15 of the pump jack construction.; "Pivoted upon the base 15 as at 16 isa bell crank lever, one branch 17 of which is terminally connected with the cable 18 which leads from a suitable source of motive power utilized to operate the pump.` The bell crank lever is rocked upon its pivot 16 to reciprocate the pump rod 11, through the instrumentality, of ytheA arm 13 which is connected with the other branch 19 of the bellcrank lever by the connecting member 20. This is a well known form of pump jack, and does not form any part of the resent invention. kIt is obviousthatv when t e arm113 is elevated, the pump rod is simultaneously raised, as the clamp 12 which is secured to the rod 11 repos 'upon thi` erin lil, and when 'the are: ll is lowered, the rod ll gravitates 'to its louer-niort position, constitutiujg,` 'the down strolce ot the pump. .For 'the ref ons hereinabove p nted out and vari( other refe sons, it is sometimes nece sary 'to raise the pump rod .il with a vi ot spacing or ad juetinp the p -tion ou the l( ver end oit the rod ll Awith relation to the standing valve oi the pump, and 'a order to accomplish this resiiit without the necessiti7 oli running,A haelt and Forth to the punip and motive povvcr therefor l l ave derised what l terni a f-:paciue Ilach, clearly shown in the drawings,

This jack cmuprisct: a tubular casing, which can he constructed 'from any suitable material and also vary in six/ie without departing` :troni the spirit ot the inventicnl. Fitted in the lower end oli this casing; a thhnhle ilirovided with threaded openings adapted loiregprister with openings formed in the lower portion ol the cising; in order to allow the handle hars QP to he associated with this end oi the pick. These handle hars have their inner extremities tapered and threaded as at 2l so that they can he conveniently screwed into or out of the openings `proridcal in the thilnhle 22, This thinihle can he provided with any ninnher of these openings to accommodate the desired number of handles, although but two of these handles are shown. Fitted in the upper end o'l" the casing; 2l a nut 25 oil' sleeve like formation, and threaded into this nut is holler.7 screw 2G. The screw is of a length to extend approximately throughout the entire length oli the casing ill, and includes a non-threaded upper por# tion 2T which projects above the casing,r 2l; this portion is provided with a plurality of tapered threaded openings QB to acconnnodate handle hars Q5), there heine two o such hars illustrated in the drawing. Each of these hars has one end tapered and threaded as at 30, so that the har can be eorneniently screwed into one of the openings when use of the joel; desired. The handle bars Ell) project .laterlly from the screw QG and are arraiuijed in ',:iarallelisin with the handle bars 23 carried hy the lower end of the casing1 ttlniivelly mounted upon the upper end oi this screw is a cap 3l which is provided with an opening;` similar to the openings 28 of the screw to accommodate the tapered threaded extremity 39 ol" a short handle har N3. lllhen the j'aclc is used, it is arranged upon the puinp rod ll as shown in Figure il, the pump rod passino' through the screw 2:6 and also through the opening); el/l formed centrally in the swivelled eap ol. A clamp oil'iany suitahle, character is then arranged upon the pump rod as shown in Figure l, wherein this clarnp is indicated'atl and disposed upon the swivelled cap 3l. lVhen 1,577,249 Y l i desired to raise or lower the punip rod lor the purpose of properly spacing or adjusting 'the piston on 'the lower end of the rod with relation to the standing valve olf' the pump, the clamp l2 is loosened to perinit the rod to slide through the jack. However when the clamp l2 is loosened, the clamp 35 is of course tightened to the rod, and by turning the screw 26 by means ofthe handle bars 29, the pump rod is raised or lowered dependingr upon the direction of rotation of the screw. During this oijieration, the handle har 33 1s taken vhold o' to maintain the erp 3l stationary,

so that the rotation of the screw 2G will not he traiurinitted to the cap, which would oil course result in uncoupling the sections olf the rod lll, after the la ttor are turned inciw dent to the raising or lowering of said rod. l't will he mani. troni an inspection oiE the drawing', that the jacl: in its entirety is very siinple in construction, light in Weight, so that it can be easily ported 'from one pump to another to malte the necessary ad justinents above referred to, and that by reason of its use, this adjustment of the piston with relation to the standing Valve olE any pump can be accomplished in comparatively quick order as compared with the usual method above utilized in performing' this duty. Alfter the adjustment has heen made, the elainp 12 is again tightened on the rod ll., and the elainp 3.5 together with a jack a whole removed from the rod. lli desired use may be made of an additional clan'uln 3G, which is adapte-d to be associated 1with the rod ll at a proper point in its length to prevent the rod from falling Wholly within the cylinder or easing 10, which might occur should the cable 18 break during` the operation of the pump, or should the clamp l2 Work loose from the rod. It might here he stated, that the component parts oil the jack may be constructed 'liroin any suitable material, vary in size andconligurm tion and that the threads on the screw 26 may he either right or lett hand threads without departing troni the spirit ot the invention. lt the screw is provided with a lett hand thread use ofthe cap 31 and the handle bar Zll may be dispensed with.

lllhile it is believed that 'troni the -fore- @eine description, the nature and advantages ol the invention will he readily apparent, l desire to have it understood that I do not liniit myself to what is herein shown and described, and that such changes may be resorted to when desired as fall Within the scope of what is claimed.

`llavil'ig thus described the invention, I rlann: i

An adjusting' jack 'for-use with a rod inenilief, said jack comprising; a easing, 'a

sleeve fitted in the uppercud-ol3 the casingl i and interiorly threaded, a hollow adjusting screw threaded n said sleeve and of a, length substantially equal to that of the casing, and projecting above the sleeve, handle bars projecting laterally from said screw 5 above the casing, handle bars .projecting laterally from theeasing adjacent ,the lower end thereof, a. cap swvelly mounted on the upper end of said screw and having a cern tral openmg to reeelve. sa1d rod member when ipa-Seed through thel screw, and a clamp adapted to engage sald rod member and re- 

